Hi Tinker,

Turning the mixture adjuster counter-clockwise results in a higher duty cycle, clockwise - lower. I was under the impresssion that the lower the number the richer the mixture. I haven't really spent a lot of time trying to optimise mine yet but I have it slightly rich and it seems to be oscillating between +2/-2 ma when in closed loop mode. I discovered a few other things, my fan switch wasn't cutting in and after the temp reaches a certain number of degrees it seems to go into a FOM with a duty cycle in the 20% region - sorry can't remember the exact figure. Also, if the free play of 1-2mm isn't there and zero isn't set correctly then you won't go closed loop at all, I guess this is the basic mixture adjustment and being outside of this screws up the works. Mine hot starts just fine and cold starts the same so I guess I'm on the money. It doesn't start on first turn of the key like my 190 E but after 3-4 turns of the starter. Seems fine to me. Ignition is 100%

Cheers,
Neil

Neil,

Thanks for the post. Yes, something is REALLY screwie on my wife's car. When I lean mine, my duty cycle declines! I had it set close to the factory specified 50% duty cycle and it failed the biannual emissions test . The shop leaned it much more and now I get a duty cycle near 20%. It runs fine and doesn't leave any black soot on the garage floor in the morning like it use to. Go figure.

Your range of +/- 2ma at the EHA sounds right on the money. When I adjusted mine, it was a bit tighter, maybe +/-1ma or +/-.75ma.

Enjoy.

Tinker

Hi, in theory the potentiometer is it be set like that, see the pdf

Attached Files

Réglage potentiomètre ke.pdf (18.8 KB, 312 views)

I'm sure you didn't notice but you replied to a 9 yr old post.